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\frac{1}{3}=1-\frac{1}{x}
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
\frac{1}{3}=\frac{x}{x}-\frac{1}{x}
To add or subtract expressions, expand them to make their denominators the same. Multiply 1 times \frac{x}{x}.
\frac{1}{3}=\frac{x-1}{x}
Since \frac{x}{x} and \frac{1}{x} have the same denominator, subtract them by subtracting their numerators.
\frac{x-1}{x}=\frac{1}{3}
Swap sides so that all variable terms are on the left hand side.
3\left(x-1\right)=x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 3x, the least common multiple of x,3.
3x-3=x
Use the distributive property to multiply 3 by x-1.
3x-3-x=0
Subtract x from both sides.
2x-3=0
Combine 3x and -x to get 2x.
2x=3
Add 3 to both sides. Anything plus zero gives itself.
x=\frac{3}{2}
Divide both sides by 2.